
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<p>这是PHP第一个实例</p>
<?php
        echo "Hello World!";
    ?>
<h1>My first PHP page</h1>

<?php
echo "Hello World!";
?>
<!--php的注释-->
<?php
//这是php注释
/*这是php多行注释*/
?>

</body>
</html>